Grinding and tumbling mill.



F. H. ENSIGN.

GRINDING AND TUMBLING MILL.

APPLICATION FILED APR-10.19.11

Patented Aug. 28,1917.

wmvzssfs INI/EIIITO/f A WORN/5V8 FRANK I-I. ENSIGN, OF TOLEDO, OHIO.

GRINDING AND TUMBLING MILL.

reaacse.

Specification of Letters Patent.

Patented Aug. 28, 1917..

Application filed April 10, 1917. Serial No. 160,993.

To all whom it may concern Be it known that I, FRANK H. ENsIoN, a

citizen of the United States, and a resident tion.

The object of the invention is to provide a new and improved grinding and tumbling mill for use in reducing or grinding upcores, cupola Cinders, waste ends of cores, old cores, waste fire brick linings, or for cleaning castings and freeing the same of core sand. Another object is to provide a c011- tinuous and ready escape of the reduced material or the sand freed from the castings without requiring stopping of the rerolving barrel of the mill.

In order to accomplish the desired result, use is made of a revoluble barrel having its body provided with circui'nferential slots for the passage of the fine material incident to the grinding or the tumbling action to which the materials or articles are subjected within the barrel during the rotation thereof.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference inclicate corresponding parts in both views.

Figure 1 is a longitudinal central section of the grinding and tumbling mill with parts shown in elevation; and

Fig. 2 is a transverse section of the same on the line 2-2 of Fig. 1.

The grinding and tumbling mill is mounted on suitable standards 10 in which are journaled trunnions 11 extending integrally and centrally from the solid heads 12 of a barrel, the body of which is made in ringshaped sections 13 fastened together and to the heads 12 by suitable longitudinal bolts 14L. The sections 13 are provided with integral spacing lugs 15 to space the sections apart and from the heads 12 with a view to provide circumferential slots 16 between adj acent sections and between the end sections and the heads 12 to allow ready escape of the fine material incident to the grinding or tumbling action to which the materials or articles are subjected within the barrel during the rotation thereof. The lugs 15 are arranged in longitudinal rows, the rows being spaced equal distances apart, and the bolts 14 extend centrally through the lugs 15, as plainly indicated in the drawings. Each of the barrel body sections 13 is provided along the inner face with inwardly projecting lugs 17 to assist in carrying the articles up on the ascending side of the barrel and to allow the articles to drop back thus insuring a continuous agitation of the articles with a view to facilitate the removal of the sand and other extraneous matter ad- 'hering to the castings under treatment at the time. When reducing the waste cupola cinders, waste ends of cores, old cores or waste fire brick linings and similar materials then the lugs 1'? keep the material loosened up to insure a quick reduction thereof.

Portions of the ring sections 13 are cut out between adjacent rOWS of lugs 15 to form an opening 20 in the peripheral face of the body of the barrel for placing the material or castings into the barrel or removing the cleaned castings therefrom. The opening 20 is normally closed by a cover 21 having an annular flange 22 resting exteriorly on the wall of the opening 20, as will be readily understood by reference to the drawings. Suitable fastening devices, such as pins 23, extend through apertured lugs 24 formed on. the ring sections 13 on opposite sides of the opening 20, the said pins extending over the outside of the cover 21 to hold the latter in place. By forming the opening 20 between adjacent rows of lugs 15 of the rings, and forming the rings on opposite sides of the opening with lugs 24, the cover is held by said lugs from circumferential and longitudinal movement, so that when the pins 23 are inserted in the lugs 24L, the cover is firmly and securely held in position. The cover 21 is also provided with exterior handles 25 to permit of conveniently placing the cover in position on the body of the barrel or removing it therefrom.

The tumbling barrel is preferably inclosed in a casing 30 attached to the standards 10 and provided at the top with a cover 31 somewhat larger than the cover 21 and adapted to register therewith at the time the cover 21 is in uppermost position to permit of charging the barrel with the material or castings to be treated or removing the cleaned castings from the barrel. The bottom of the casing 30 is provided with a suitable outlet 32 for the passage of the reduced material or the casting sand. The outlet 32 may be connected with a suitable suction fan for drawing the reduced mas terial or sand out of the casing 30 and delivering it to a suitable place of discharge. One of the trunnions 11 is provided with a pulley 40 connected by a belt 41 with other machinery for imparting a continuous rotary m-otion to the barrel, but I do notlimit myself to the means shown and described for rotating the barrel as such means may be varied.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A grinding mill having end walls with trunnions and a body portion comprising annular ring sections, each ring section having spaced lugs onits side, and radial projections on its inner surface, said lugs and projections being alternately'located on the outer and inner faces respectively of the sections, and bolts passing through the said lugs and end walls, for binding sald parts inplace. v

A grinding and tumbling mill provided with a revoluble barrel having its body formed of ringshaped sections provided with spacing'lu'gs to space the sections apart, portions of the sections between adjacent rows of lugs being cut out'to form an open ing for the introduction of the materials 01' articles to be treated, the ring sections on 'opposlte sides of the openlng being provided with apertured'lugs, a door resting upon thesectmns, and pins passlng through the apertured lugs and engaging the outer face of the door.

FRANK H. ENSIGN.

"Copies of this patent may be obtained for'five cents each, by addressing the Commissioner of'Iatents. Washington, D10? 

